MC7918CT Fairchild Semiconductor, MC7918CT Datasheet

Linear Regulators - Standard TO-220 1A Neg Volt

MC7918CT

Manufacturer Part Number
MC7918CT
Description
Linear Regulators - Standard TO-220 1A Neg Volt
Manufacturer
Fairchild Semiconductor
Datasheet
1.MC7918CT.pdf (16 pages)

Specifications of MC7918CT

Polarity
Negative
Number Of Outputs
1
Output Type
Fixed
Output Voltage
- 18 V
Output Current
1 A
Line Regulation
360 mV
Load Regulation
360 mV
Dropout Voltage (max)
2 V
Input Voltage Max
- 35 V
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
0 C
Package / Case
TO-220
Mounting Style
Through Hole
Output Voltage Tolerance
+/- 4 %
Voltage Regulation Accuracy
4 %
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

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MC7900 Series
1.0 A Negative Voltage
Regulators
intended as complements to the popular MC7800 series devices.
These negative regulators are available in the same seven−voltage
options as the MC7800 devices. In addition, one extra voltage option
commonly employed in MECL systems is also available in the
negative MC7900 series.
these regulators employ current limiting, thermal shutdown, and
safe−area compensation − making them remarkably rugged under
most operating conditions. With adequate heatsinking they can deliver
output currents in excess of 1.0 A.
•
•
•
•
•
•
© Semiconductor Components Industries, LLC, 2006
August, 2006 − Rev. 14
The MC7900 series of fixed output negative voltage regulators are
Available in fixed output voltage options from − 5.0 V to − 24 V,
Pb−Free Lead Finish
No External Components Required
Internal Thermal Overload Protection
Internal Short Circuit Current Limiting
Output Transistor Safe−Area Compensation
Available in 2% Voltage Tolerance (See Ordering Information)
Pb−Free Package May be Available. The G−Suffix Denotes a
1.2 k
3.6 k
Figure 1. Representative Schematic Diagram
This device contains 26 active transistors.
1.1 k
2.0 k
2.0 k
1.6 k
20 k
8.0 k
1.0 k
20 k
20 pF
10 pF
10 k
240
10 k
4.0 k
750
1
R
R
1
2
Gnd
0.3
V
V
O
I
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
See general marking information in the device marking
section on page 14 of this data sheet.
and the output voltages. The input voltage must
remain typically 2.0 V above more negative even
during the high point of the input ripple voltage.
XX,
Input
**
**
A common ground is required between the input
0.33 mF
case outline drawing) is connected to Pin 2.
DEVICE MARKING INFORMATION
Heatsink surface (shown as terminal 4 in
These two digits of the type number
indicate nominal voltage.
C
appreciable distance from power supply filter.
C
connected to Pin 2.
C
Heatsink surface
in
O
in
CASE 221AB
*
D2T SUFFIX
is required if regulator is located an
improve stability and transient response.
ORDERING INFORMATION
STANDARD APPLICATION
CASE 936
T SUFFIX
TO−220
D
2
PAK
http://onsemi.com
Pin 1. Ground
MC79XX
2. Input
3. Output
Publication Order Number:
1
2
1
2
3
3
C
1.0 mF
O
**
MC7900/D
Output

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MC7918CT Summary of contents

Page 1

MC7900 Series 1.0 A Negative Voltage Regulators The MC7900 series of fixed output negative voltage regulators are intended as complements to the popular MC7800 series devices. These negative regulators are available in the same seven−voltage options as the MC7800 devices. ...

Page 2

MAXIMUM RATINGS (T = +25°C, unless otherwise noted.) A Input Voltage (−5.0 V ≥ V ≥ − Input Voltage (24 V) Power Dissipation Case 221A T = +25°C A Thermal Resistance, Junction−to−Ambient Thermal Resistance, Junction−to−Case 2 Case 936 ...

Page 3

MC7905AC ELECTRICAL CHARACTERISTICS Characteristics Output Voltage (T = +25°C) J Line Regulation (Note 2) −8.0 Vdc ≥ V ≥ −12 Vdc 1 −8.0 Vdc ≥ V ≥ −12 Vdc 1.0 A ...

Page 4

MC7906C ELECTRICAL CHARACTERISTICS Characteristics Output Voltage (T = +25°C) J Line Regulation (Note +25° 100 mA −8.0 Vdc ≥ V ≥ − 25 Vdc I −9.0 Vdc ≥ V ≥ −13 Vdc I ...

Page 5

MC7912B, MC7912C ELECTRICAL CHARACTERISTICS Characteristics Output Voltage (T = +25°C) J Line Regulation (Note +25° 100 mA −14.5 Vdc ≥ V ≥ − 30 Vdc I −16 Vdc ≥ V ≥ − 22 ...

Page 6

MC7915B, MC7915C ELECTRICAL CHARACTERISTICS Characteristics Output Voltage (T = +25°C) J Line Regulation (Note +25° 100 mA −17.5 Vdc ≥ V ≥ − 30 Vdc I −20 Vdc ≥ V ≥ − 26 ...

Page 7

MC7918C ELECTRICAL CHARACTERISTICS Characteristics Output Voltage (T = +25°C) J Line Regulation (Note +25° 100 mA −21 Vdc ≥ V ≥ − 33 Vdc I −24 Vdc ≥ V ≥ − 30 Vdc ...

Page 8

Infinite Heatsink 5°C/W HS 5.0 q 4.0 = 15°C/W HS 3.0 2.0 No Heatsink 1.0 0.5 0.4 0 5° C 65° C (max) = 15W D 0.1 25 ...

Page 9

Design Considerations The MC7900 Series of fixed voltage regulators are designed with Thermal overload Protection that shuts down the circuit when subjected to an excessive power overload condition. Internal Short Circuit Protection that limits the maximum current the circuit will ...

Page 10

Figure 11. D Power Dissipation versus P.C.B. Copper Length Line Regulation − The change in output voltage for a change in the input voltage. The measurement is made under conditions of low dissipation ...

Page 11

Nominal Output Voltage Device MC7905ACD2T −5.0 V MC7905ACD2TG MC7905ACD2TR4 MC7905ACD2TR4G MC7905ACT MC7905ACTG MC7905BD2T MC7905BD2TG MC7905BD2TR4 MC7905BD2TR4G MC7905BT MC7905BTG MC7905CD2T MC7905CD2TG MC7905CD2TR4 MC7905CD2TR4G MC7905CT MC7905CTG MC7905.2CT −5.2 V MC7905.2CTG MC7906CD2T −6.0 V MC7906CD2TG MC7906CT MC7906CTG MC7908ACT −8.0 V MC7908ACTG MC7908CD2T MC7908CD2TG ...

Page 12

Nominal Output Voltage Device MC7912ACD2T −12 V MC7912ACD2TG MC7912ACD2TR4 MC7912ACD2TR4G MC7912ACT MC7912ACTG MC7912BD2T MC7912BD2TG MC7912BD2TR4 MC7912BD2TR4G MC7912BT MC7912BTG MC7912CD2T MC7912CD2TG MC7912CD2TR4 MC7912CD2TR4G MC7912CT MC7912CTG MC7915ACD2T − MC7915ACD2TG MC7915ACT MC7915ACTG MC7915BD2T MC7915BD2TG MC7915BT MC7915BTG MC7915CD2T MC7915CD2TG MC7915CD2TR4 MC7915CD2TR4G MC7915CT ...

Page 13

... Nominal Output Voltage Device − MC7918CT MC7918CTG − MC7924BT MC7924BTG MC7924CD2T MC7924CD2TG MC7924CT MC7924CTG †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. MC7900 Series Output Voltage Tolerance ...

Page 14

MC7900 Series MARKING DIAGRAMS TO−220 T SUFFIX CASE 221AB MC MC 79xxACT 7905.2CT AWLYWWG AWLYWWG PAK D2T SUFFIX CASE 936 MC MC 79xxACD2T 79xxBD2T AWLYWWG AWLYWWG ...

Page 15

OPTIONAL K A CHAMFER 0.010 (0.254 10.66 0.42 *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and ...

Page 16

Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products ...

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